Westward expansion was further fueled by events that happened in the mid-1800s. In 1836, Question Blank
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became independent of Mexico and would join the United States in 1845. This event was followed by the Mexican-American War, which officially ended in 1848 with the Treaty of Guadalupe-Hidalgo. The
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was part of this treaty, which gave the United States much of the present-day American
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for $15 million. As a result, Mexico was almost cut in half. Americans continued to settle in the West. The Gold Rush, beginning in the late 1840s, resulted in an astonishing growth in the population of
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which became a state in 1850. Many individuals, primarily young men, headed west with the hope of "striking it rich." As the United States continued to expand rapidly, issues such as slavery continued to threaten to divide the nation.

The word bank is
California Northwest Negotiations Southwest Oregon Exchange
New Mexico Louisiana Purchase Oklahoma Texas
Southeast Mexican Cession Arizona North